Try making each child a different "Piggy". Let them respond to you when it is their turn. They can respond by singing and/or with an action related to the line.
What other Piggies can the class come up with? This is a perfect song for which your class can write its own verses.
You can print out and do the This Little Piggy Maze.
You can print out and colour the This Little Piggy Colouring Sheet.